sawyer



(No Model.)

G. BUGKLEY & L. L. SAWYER.

SPRING CURTAIN ROLLER. No. 275,987. Patented Apr. 17,1883.

UNITED STATES PATENT Fries.

CHAUNGEY BUOKLEY AND LODOWIGK L. SAY VYER, OF 1\IERIDEN,'OONN.

SPRING CURTAIN-ROLLER.

SPECIFICATION forming part of Letters Patent No. 275,987, dated April 1'7, 1883.

Application filed November 27, 1882. (No model.)

To all whom it may concern Be it known that we, CHAUNGEY BUoKLnY and Lonowrox L. Snwvna, of Meriden, in the county of New Haven and State of Connecticut,have invented a new Improvement in Ourtain-Fixtures; and we do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure 1, a front view of the end of the roll where the mechanism is applied; Fig. 2, an end view of the same; Fig.3, an inside view of the bracket, showing the notched collar and the spindle; Fig. 4, a section through the chamber f, showing the locking-cam disengaged; Fig. 5, the same as Fig. 4, showing the locking-cam engaged; Fig. 6, a top view of the roll, showing a section of the bracket interlocking with the spindle; Fig. 7, a longitudinal section of the roll.

This invention relates to an improvement in that class of curtain-fixtures in which a spring is arranged in a chamber at one end of the roll, one end of the spring engaging a fixed spindle, the other end fixed to the roll, and so that pulling down the shade winds the spring, and then the reaction of the spring turns the roll in the opposite direction to draw up the shade, and particularly to those fixtures of this class in which the reaction of the spring is arrested by a pawl, arranged to engage the roll when the revolution of the roll does not exceed acertain velocity; but when the roll is running more rapidly the pawl will not engage theroll. Hence the winding will continue until the revolution of the roll be slackened sufficiently to permit the pawl to engage it.

In this class of fixtures, unless there be a locking device which will engage the spindle with the roll when moved from its bracket, the reaction of the spring will cause the spindle to revolve and'the spring run down, and then before the roll can be replaced in the bracket the spring must be rewound, and only a person familiar with the mechanism can replace the roll in the bracket with the spring in an operative condition.

In the usual construction of this class-of fixtures the locking device to automatically may easily put up the fixtures and remove or replace them after they have been put up; and it consists in the details of construction, as more fully hereinafter described, and more particularly recited in the claims.

A represents the roll, which is of common construction. It is constructed with a concentric longitudinal chamber, a, at one end, into which the longitudinal central spindle, B, is arranged, with a helical spring, 1), around the spindle, one end attached to the spindle and the other to the roll in the usual manner for this class of fixtures, and too well known to require further description. On the spindle is an eccentric, (1, upon which hangs alockingcam, 6. This cam is within a chamber,f. The position of the spindle and eccentric with relation to the roll, when in the bracket and ready for operation, is, as seen in Fig. 4, with the eccentric upward, so that the surface of the cam e hangs free from the walls of the chamberf. The spring being wound with the parts in this condition leaves the roll free for action of the spring, it being understood that the spindle is held firm in the bracket. Now, if the roll be raised to take the spindle from the bracket, the roll in that case being held by the hand, the reaction of the spring will come directly upon the spindle and cause that to rotate until the eccentric forces the cam against the wall of the chamber f, as seen in Fig.5, and when it has reached the wall it there arrests the further revolution of the spindle, and the spindle and roll are firmly locked together, and will so remain until, replacing the roll, the spindle falls into its position in the bracket to prevent its rotation, and which will bring the eccentric hack to the position in Fig. 4, to relieve the roll from its interlocked condition with the spindle. This eccentric and too swinging cam, for locking the spindle and roll together, are shown in a previous patent of our own. With this device for locking the spindle and roll something is necessary to hold the shade when drawn down, to prevent the reaction of the spring from rolling it up. To do this we form a collar, II, in connection with or made as a part of the roll, but so as to revolve with the roll, and so as to take a position close to the bracket 0, as seen in Fig. 6, and in this collar is one or more notches, 1'. Upon the bracket a pawl, l, is hung upon. a pivot, m, as seen in Fig. 3, its nose riding upon the collar h, and so as to enter a notch, t, in said collar and hold the roll against the reaction of the spring. The back of the nose of the pawl or notch is inclined or otherwise constructed, so that when the curtain is drawn upon to revolve the roll the pawl will escape from the notch and permit such drawing of the shade. Then, it the shade be permitted to rise under the reaction of the spring with freedom, and so that the roll will revolve rapidly, the movement of the collar is so quick as to prevent the possibility of the nose of the pawl engaging the notch thereon; but if, in so raising the shade, its rise beretarded, then the nose will engage the collar and hold the roll at the point where such engagement is permitted.

The trunnion or end at of the spindle has a notch,p, on one side, making it narrower in that notch in its vertical position than the diameter of the spindle. The bracket has a corresponding vertical recess, r, into which the notch of the trunnion will pass and engage the bracket, as seen in Fig. 6, so as to prevent longitudinal or axial movement of the spindle. This is necessary in order to insure the proper working of the pawl in connection with the collar h, for the reason that the pawl must be necessarily thin, and if axial movement be permitted at that end of the roll'to any considerable extent the pawl would drop between the collar and the bracket, and thus disarrange the mechanism of the roll. -In order to insure the proper position of the spindle in thebracket, one side, 8, of the recess in the bracket is made of the width of the notch, and the opposite side wider, as seen in Fig. 6, and that side or back of the spindle is flattened, as seen in Fig. 2, so that the spindle can only be inserted when the notch is brought to that thinner side 8 of the recess. As the pawl must be thrown back away from its working position when the spindle is removed, and which will be done by the lifting of the roll from the bracket, it is desirable that when the roll is returned it may also return the pawlto its proper working position. To this end we construct the pawl with a tailpiece, it, on the opposite side of the pivot, and provide a stop, a, on the bracket, (see Fig. 3,) against which this tail-piece will stand when the pawl is in its working position. If in this condition the roll be raised it will turn the pawl over from its working position, as seen in broken lines, Fig. 3, and so as to rest upon the stop a, and this will bring the tail t within the space occupied by the collar, as seen in broken lines, Fig. 3. Thus when the roll is returned the collar will strike the tail t and turn it downward, bringing the pawl again into its working position over the collar, as seen in Fig. 3.

Instead of the peculiar locking device-that is to say, the swinging cam e, hung upon the eccentric d-other known locking mechanism between the spindle and the roll may be emwhenrunningrapidly. Thesedevices arcshown in several patents granted to ourselves-individually or jointly.

We claim- 1. The combination of a roll having a longitudinal chamber at one end, a spindle in said chamber, a helical spring around said spindle, one end engaged with the spindle and the other with the roll, a device, substantially such as described, to automatically interlock the roll and spindle and prevent the reaction of the spring, with a bracket to receive the end of the spindle, and constructed to prevent the spindle from turning in the bracket, a pawl hung to said bracket, and a notched collar on the roll with which said pawl will engage, sub stantially as described.

2. The combination of a roll having a longitudinal chamber at one end, a spindle in said chamber, a helical spring around said spindle, one end engaged with the spindle and the other with the roll, a device, substantiallysuch as described, to automatic-ally interlock the roll and spindle and prevent the reaction of the spring, with a bracket to receive the end of the spindle, and constructed to prevent the spindle from turning when in the bracket, a pawl hung to said bracket and constructed with a tail, t, a stop, a, on the bracket, and a notched collar on the roll with which said pawl will engage, substantially as described.

3. The combination of a roll having a longitudinal chamber at one end, a spindle in said chamber, a helical spring around said spindle, one end engaged with the spindle and the other with the roll, a device, substantially such as described, to automatically interlock the roll and spindle and prevent the reaction of the spring, with a bracket to receive the end of the spindle, the spindle constructed with a notch, 12, on one side, to engage a corresponding side, 8, of the bracket, with a pawl hung to said bracket, and a notched collar on the roll ing said can], notched collar h on said roll,the with which said pawl will engage, substanbracket G,constructed with a recess to receive tially as described. the end of the spindle and prevent it from 4. In a curtain-fixture, the combination of turning", and the pawl l, hung to said bracket,

5 the roll A, constructed with a longitudinal substantially as described.

chamber, the spindle B, arranged in said cham- GHAU NGEY BUOKLEY. her, spring 1) around said spindle, one end en- LODOWICK L. SAWYER. gaged with the roll, the other with the spindle, Witnesses:

the eccentric d on said spindle, swinging cam J 0s. 0. EARLE,

10 e, hung on said eccentric, chamber f, surronnd- J H.-SHUMWAY. 

